Chemistry of hydrocarbon compounds – Plural serial diverse syntheses – Same catalyst – solvent – or component thereof used in both...
Patent
1997-07-22
1999-06-22
Caldarola, Glenn A.
Chemistry of hydrocarbon compounds
Plural serial diverse syntheses
Same catalyst, solvent, or component thereof used in both...
585312, 585311, 585314, 585315, 585324, 585329, 585330, 585639, 585648, 585653, 208 49, C07C 110, C07C 406
Patent
active
059144335
ABSTRACT:
The present invention relates to a process for the production of light olefins comprising olefins having from 2 to 4 carbon atoms per molecule from an oxygenate feedstock. The process comprises passing the oxygenate feedstock to an oxygenate conversion zone containing a metal aluminophosphate catalyst to produce a light olefin stream. A propylene stream and/or mixed butylene is fractionated from said light olefin stream and cracked to enhance the yield of ethylene and propylene products. This combination of light olefin product and propylene and butylene cracking in a riser cracking zone or a separate cracking zone provides flexibility to the process which overcomes the equilibrium limitations of the aluminophosphate catalyst. In addition, the invention provides the advantage of extended catalyst life and greater catalyst stability in the oxygenate conversion zone.
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Caldarola Glenn A.
Dang Thuan D.
McBride Thomas K.
Silverman Richard P.
Tolomei John G.
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